/*
 * Copyright Konstantin Triger <kostat@gmail.com> 
 * 
 * This file is part of Jaque - JAva QUEry library <http://code.google.com/p/jaque/>.
 * 
 * Jaque is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * Jaque is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 */

package jaque.expressions;

import jaque.functions.Function;

/**
 * @author <a href="mailto://object_streaming@googlegroups.com">Konstantin Triger</a>
 * 
 * @param <Result>
 *            the type of the return value.
 * @param <T>
 *            the type of the only parameter.
 */
abstract class UnaryFunction<Result, T> implements Function<Result, T> {
	private final Function<? extends Result, ? super T> _value;

	protected UnaryFunction(Function<? extends Result, ? super T> value) {
		_value = value;
	}

	// @Override
	public Result invoke(T source) throws Throwable {
		return _value.invoke(source);
	}

	public Function<? extends Result, ? super T> getFirst() {
		return this;
	}
}
